/**
* Register a POIFSReaderListener for a particular document
*
* @param listener the listener
* @param path the path of the document of interest
* @param documentName the name of the document of interest
*/
public void RegisterListener(POIFSReaderListener listener,
POIFSDocumentPath path,
String documentName)
{
if (!omnivorousListeners.Contains(listener))
{
// not an omnivorous listener (if it was, this method is a
// no-op)
ArrayList descriptors = (ArrayList)selectiveListeners[listener];
if (descriptors == null)
{
// this listener has not Registered before
descriptors = new ArrayList();
selectiveListeners[listener] = descriptors;
}
DocumentDescriptor descriptor = new DocumentDescriptor(path,
documentName);
if (descriptors.Add(descriptor) >= 0)
{
// this listener wasn't alReady listening for this
// document -- Add the listener to the Set of
// listeners for this document
ArrayList listeners =
(ArrayList)chosenDocumentDescriptors[descriptor];
if (listeners == null)
{
// nobody was listening for this document before
listeners = new ArrayList();
chosenDocumentDescriptors[descriptor] = listeners;
}
listeners.Add(listener);
}
}
}
private void DropDocument(POIFSReaderListener listener,
DocumentDescriptor descriptor)
{
ArrayList listeners = (ArrayList)chosenDocumentDescriptors[descriptor];
listeners.Remove(listener);
if (listeners.Count == 0)
{
chosenDocumentDescriptors.Remove(descriptor);
}
}